Hi, Still a bit green on all this ... I have seen an error message I am not familiar with (i.e. not illegal sum-out) But: SUM(INPUTS) ! = SUM (OUTPUTS), 669721378183728.3 = 1.130101692988369e +300 possible hardware failure...etc.I see no refernce to this in the Readme file (as opposed to illegal sumout above) Any enlightenment on this would be most appreciated!!?? All The Best, Ian McLoughlin, Chematek U.K. Tel/Fax : +44(0)1904 679906 Mobile : +44(0)7801 823421 Website: www.chematekuk.co.uk _________________________________________________________________ Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Mersenne Prime FAQ -- http://www.tasam.com/~lrwiman/FAQ-mers